Funding for this research was provided by:
National Natural Science Foundation of China (81672579 and 81872124)
Received: 25 October 2018
Accepted: 13 January 2019
First Online: 24 January 2019
Ethics approval and consent to participate
: This study was preceded in accordance with the standards of Institute Research Ethics Committee of Sun Yat-sen University Cancer Center.
: Not applicable.
: The authors declare that they have no competing interests.
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